'Faithfully' in the Bible

“Lift up your eyes to the heavens,Then look to the earth beneath;For the heavens will be torn to pieces and vanish like smoke,And the earth will wear out like a garmentAnd its inhabitants will die in like manner.But My salvation will be forever,And My righteousness (justice) [and faithfully fulfilled promise] will not be broken.

“For the moth will eat them like a garment,And the worm will eat them like wool.But My righteousness and justice [faithfully promised] will exist forever,And My salvation to all generations.”

For I, the Lord, love justice;I hate robbery with a burnt offering.And I will faithfully reward them,And make an everlasting covenant with them.